# Sigaspis

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***Sigaspis*** is an [extinct](/source/Extinct) [monospecific](/source/Monospecific) [genus](/source/Genus) of [arthrodire](/source/Arthrodire) [placoderm](/source/Placoderm) fish from the [Early Devonian](/source/Early_Devonian) period. The [type species](/source/Type_species) ***Sigaspis lepidophora*** was [described](/source/Scientifically_described) by [Daniel Goujet](/source/Daniel_Goujet) in 1973, and was found on the island of [Spitsbergen](/source/Spitsbergen), [Svalbard](/source/Svalbard) in [Norway](/source/Norway).[1]

It is one of the more [basal](/source/Basal_(phylogenetics)) members of the [order](/source/Order_(biology)) [Arthrodira](/source/Arthrodira), as shown in the [cladogram](/source/Cladogram) below:

## References

1. Goujet, Daniel (January 1973). ["Sigaspis, un nouvel arthrodire du Dévonien inférieur du Spitsberg"](https://www.researchgate.net/publication/290391621_Sigaspis_un_nouvel_arthrodire_du_Devonien_inferieur_du_Spitsberg). *Palaeontographica Abteilung A*. **143**: 73–88.

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